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Spiral steel pipe maintenance

Categories:company news
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Time of issue:2020-03-16
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(Summary description)Use solvents and emulsions to clean the surface of the steel to remove oil, grease, dust, smoothing agents and similar organic substances, but it can not remove the rust, scale, welding flux, etc. on the surface of the steel, so it is only used as an aid in anti-corrosion.

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Spiral steel pipe maintenance

Categories:company news
Author:
Origin:
Time of issue:2020-03-16
Views:1

Information

1. Cleaning

Use solvents and emulsions to clean the surface of the steel to remove oil, grease, dust, smoothing agents and similar organic substances, but it can not remove the rust, scale, welding flux, etc. on the surface of the steel, so it is only used as an aid in anti-corrosion.

2. Spray (throw) shot to remove rust

Spray (throw) shot rust removal is a high-speed motor driven spray (throw) shot blade high-speed torsion, which makes steel grit, steel shot, iron wire section, minerals and other abrasive materials spray (throw) shot on the surface of the steel pipe under the effect of centrifugal force Not only can rust, oxides and dirt be completely eliminated, but the steel pipe can reach the required average roughness under the effect of the fierce impact of abrasive and friction.

After spraying (throwing) the rust, not only can the physical adsorption effect of the pipe surface be expanded, but also the mechanical adhesion effect of the anticorrosion layer and the pipe surface can be strengthened. Therefore, spray (jet) rust removal is an ideal rust removal method for pipeline corrosion protection. Generally speaking, shot blasting (sand) rust removal is mainly used for pipe internal and external disposal, shot blasting (sand) rust removal is mainly used for pipe surface treatment.

3. Tool derusting

Mainly use steel wire brushes and other tools to polish the steel surface, which can remove loose or lifted scale, rust, welding slag, etc. The rust removal of hand tools can reach Sa2 level, and the rust removal of power tools can reach Sa3 level. If the steel surface is attached with a strong scale, the result of tool rust removal is not ideal, and the anchor depth required for anti-corrosion construction cannot be reached.

4. Pickling

Generally, chemical and electrolytic methods are used for pickling treatment. Pipeline anticorrosion only uses chemical pickling, which can remove oxide scale, rust, and old coatings. Sometimes it can be used for reprocessing after sand blasting and rust removal. Although chemical cleaning can make the surface reach a certain degree of cleanliness and roughness, but its anchor lines are shallow, and it is easy to form pollution to the situation.